Protector for smoke-box fronts.



PATBNTBD DEG. zo, 19Q4.

'APPLIQATION FILED MAB.. 31. 1904.

No MODEL'.

[NVE/WOR j UNITED 'STA-Tias 1 Patented December 20, 1904,

WILLIAM P. KELLEY, OF PITTSBRG, PENNSYLVANIA.

PROTECTOR FoF SMOKE-Box FRoNTs.

SPECIFICATION forming part of Letters Patent No. 778,134, dated December 20, 1904.

I Application filed March 31, 1904. Serial No. 200,922.

To all whom it may concern: c

Be it known that I, WILLIAM P. KELLEY, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Protectors for Smoke- Box Fronts in Locomotives; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in-the art to which it appertains to make and use the same.

My invention relates to improvements in protectors for smoke-box fronts used in locomotive-boilers; and the object of my invention is to protect such fronts from-injury on account of the fact that they are heated on the inside and subjected to the action of cold air on the outside.

With these objects in view my invention consists in the construction.andcombinations of parts, as hereinafter described and claimed.

In the accompanying drawings, Figure lis a vertical section of the front end of a locomotive-boiler with my invention applied thereto. Fig. 2 is a cross-section of the same, taken on the line 2 2 of Fig. 1. Fig. 3 is an enlarged cross-section of one'of the protective bricks or coverings. f

c represents the front end of a locomotiveboilerV which is provided with the usual tubes g, a smoke-stack Z), and a smoke-box front c. To the lower part of this smoke-box front are applied the bricks or protective covers d, which are fastened to the smoke-box` front by bolts e. I have shown these bricks as extending only half-way around the smoke-box front, and this is all that is necessary in ordinary cases; but I do not restrict myself to this.

Furthermore, the centerf of the smoke-box front is not shown as protected, experience has shown that this is notl necessary.

The bricks OZ are made of any suitable re-lfractory material, preferably asbestine, and when they are put in place they are laid in a layer of cement 7i, which cement thoroughly iills all the small interstices between the bricks and between said bricks and the smoke-box front. The cement used must of course be of such anature that it will stand heat and make a perfectly tight joint.

' off and a new one put on. n improved device, consisting of fireproof bricks In the ordinary locomotive, which has an unprotected smoke-box front, the cinders accumulate in the smoke-box front, and as they -accumulate they rest against the front. There being no lining, air is forced in through the small crevices and joints when the locomotive is going at a high speed, and this air fans the accumulation of cinders into a white heat. These white-hot cinders resting against this casting on the inside while the locomotive is in rapid motion against the cold air on the outside cause the large casting which forms the main` portion of the smoke-box front to crack. As soon as the casting begins to crack more air gets into the smoke-box, and thel cinders are fanned into a still iiercer heat.

perhaps hou-rs until the casting must be taken By the use of my laid in a reproof cement, this difficulty is entirely remedied. y v

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is- Y l. The combination with the smoke-box front of a locomotive-boiler, of a protective cover applied to the inside'thereof, and a layer of cementinterposed between said cover and said smoke-box frontpadapted to form an airtight joint therebetween, substantially as described.

2. The combination with theA smoke boX vfront of a locomotive-boiler, of a refractory protective cover applied to the inside thereof, a layer of cement interposed between said cover and said smoke-box front adapted to form an air-tight joint therebetween, and

From 4rthis point on it is merely a matter of days or- IOO ' ive cover applied tliereto,said protective cover consisting of segmental refractory bricks, a

layer of cement between said bricks and said smoke-box front,and bolts securing said bricks in position, substantially as described.

5. The combination with the dish-shaped casting forming the smoke-box front of a locomotive-boiler, of a protective cover coinprising a plurality of segmental bricks constructed to t closely therein, and a layer of cement interposed between said bricks and said smoke-box front adapted to seal the latter against ingress of air, substantially as described.

6. The combination with the dish-shaped casting forming a smoke-box iront of a locomotive-boiler, of a protective cover comprising a plurality of segmental refractory bricks constructed to lit closely therein, a layer el cement interposed between said bricks and said smoke-box front adapted to seal the latter against ingress of air, and means for securing said bricks in position, substantially as described.

In testimony wliereoil l aliix my signature in presence of two witnesses.

TILLIAM l). KELLEY.

Witnesses:

J. D. PATToN, S. M. LANGDON. 

